Oxygen sensors

[Alan]

How hard is it to replace the oxygen sensors on a 94 auto?
thanks

 

[sdpatt]

The front sensor is not difficult. However, the rear sensor is a pain in the ass. You will need an O2 sensor socket, a universal joint and atleast 9" of extensions on your socket wrench. To reach the connector, I lay atop the intake manifold and reach down behind the engine. Not fun and certianly more trouble than the 3.0L "piece of cake" sensor access.

 

[Markus]

Alan:
How hard is it to replace the oxygen sensors on a 94 auto?
thanks

I was able to do my rear sensor from the bottom of the car using a simple wrench (can't recall if it was 18mm or 22m). You will have to disconnect and connect the old and new sensor using only 1 hand. Took me about 15 minutes.

 

[Todds93SHO]

I did it the way SDPATT described. It wasn't fun but I really didn't see any other way. There was no chance of my arm fitting into those spaces from underneath the car to unplug the sensor or get a wrench on it.

I think the socket is 22mm or 7/8" pretty much the same thing.